
The Energy Storage Tax Incentive and Deployment Act aims to expand the tax credit for investments in energy property to include equipment that stores and delivers energy using various technologies, such as batteries, compressed air, pumped hydropower, and thermal energy storage. The bill proposes a 30 percent investment tax credit (ITC) for energy storage systems, similar to what is offered for solar PV systems12. [pdf]
The Inflation Reduction Act (IRA) has also accelerated the development of energy storage by introducing investment tax credits (ITCs) for stand-alone storage. Prior to the IRA, batteries qualified for federal tax credits only if they were co-located with solar. Wind.
Approximately 16 states have adopted some form of energy storage policy, which broadly fall into the following categories: procurement targets, regulatory adaption, demonstration programs, financial incentives, and consumer protections. Below we give an overview of each of these energy storage policy categories.
With the rise of solar and wind capacity in the United States, the demand for battery storage continues to increase. The Inflation Reduction Act (IRA) has also accelerated the development of energy storage by introducing investment tax credits (ITCs) for stand-alone storage.
The bill also expands the tax credit for residential energy efficient property to include expenditures for battery storage technology that (1) is installed on or in connection with a dwelling unit located in the United States and used as a residence by the taxpayer, and (2) has a capacity of at least three kilowatt hours.
All of the states with a storage policy in place have a renewable portfolio standard or a nonbinding renewable energy goal. Regulatory changes can broaden competitive access to storage such as by updating resource planning requirements or permitting storage through rate proceedings.
For the most part, battery energy storage resources have been developing in states that have adopted some form of incentive for development, including through utility procurements, the adoption of favorable regulations, or the engagement of demonstration projects.

Tax incentives for the energy storage industry include12:Investment Tax Credit (ITC): This federal incentive may apply to energy storage systems such as batteries, depending on ownership and usage.Modified Accelerated Cost Recovery System (MACRS): This depreciation deduction can also benefit energy storage investments.Inflation Reduction Act (IRA): This law allows standalone storage systems to be eligible for a 30% ITC, and up to 70% with additional incentives2. [pdf]
Image: President Biden via Twitter. The Inflation Reduction Act’s incentives for energy storage projects in the US came into effect on 1 January 2023. Standout among those measures is the availability of an investment tax credit (ITC) for investment in renewable energy projects being extended to include standalone energy storage facilities.
Domestic Content – IRS Notice 2023-38 (May 12, 2023) An energy storage project (among others) is eligible for an “adder” bonus credit (generally an additional 10% ITC) if it satisfies US Federal Transit Administration–based “Buy America Requirements” for domestic content.
Industry Insight from Reuters Events, a part of Thomson Reuters. Tax credits in the U.S. Inflation Reduction Act will accelerate storage installations near urban areas and offer greater revenue potential for projects coupled with solar, industry experts said.
In addition to the bonus for the Investment Tax Credit for projects in low-income communities, the Inflation Reduction Act: Provides a bonus credit of up to 10 percentage points for qualifying clean energy investments in energy communities.
An energy storage project (among others) located in an “energy community” receives an “adder” additional credit (generally an additional 10% ITC). The energy community guidance provides definitional rules for each of the three categories of energy communities (Brownfield Category, Coal Closure Category, and Statistical Area Category).
The separate ITC incentives mean that storage assets can be developed in "locations that best suit economics," such as in urban areas where large solar farms are not possible, he noted. Faster storage growth can mean greater potential for solar.

Without a renewable energy system installed, battery systems are eligible for the 7-year MACRS depreciation schedule: an equivalent reduction in capital cost of about 25%.1 The same benefit applies to battery systems installed along with a renewable energy system if the battery is charged by the renewable energy system less than 50% of the time.2 If the battery system is charged by the renewable energy system more than 50% of the time on an annual basis, the battery should qualify for the 5-year MACRS schedule, equal to about a 27% reduction in capital costs. [pdf]
Accordingly, the battery depreciation cost can be divided into two part: the fixed cost and the controllable cost. For the fixed part, the aging process is inevitable, and a battery has a finite calendar life. For example, once a battery is installed, it will be scrapped after certain years even if it has not been put into operation.
A quantitative depreciation cost model is put forward for lithium batteries. A practical charging/discharging strategy is applied to battery management. The depth of discharge of the battery storage is scheduled more rationally. The proposed strategy improves the cost efficiency of lithium batteries in MGs.
Some factors are independent of the dispatch strategy such as the ambient temperature and cumulative usage time. While some are controllable, such as the charging/discharging strategy and the DOD in a cycle. Accordingly, the battery depreciation cost can be divided into two part: the fixed cost and the controllable cost.
Battery systems that are charged by a renewable energy system more than 75% of the time are eligible for the ITC ( When claiming the ITC, the MACRS depreciation basis is reduced by half of the value of the ITC. ), currently 30% for systems charged by PV and declining to 10% from 2022 onward.
If owned directly by a public entity, such as a public university or federal agency, battery storage systems are not eligible for tax-based incentives. If owned by a private party (i.e., a tax-paying business), battery systems may be eligible for some or all of the federal tax incentives described below.
For further analysis of the economical impact of LB management method on MG, operational costs of the two methods are compared in Table 6. When considering battery depreciation cost under the proposed method, the average DOD of LB groups is 31.11%, lower than 80% under the traditional method.
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